Refrigerating machine



Jan. I, 1929. 1,697,542

.F. w. SCHWINN REFRIGERATING MACHINE I Filed June a, 1927 s sheets-sheet 1 Jan. 1, 1929.

, F. W. SCHWINN REFRIGERATING MACHINE Filed June 6, 1927 3 Sheets-Sheet 2 Jan. 1, 1929.

F. w. SCHWINN REFRIGERATING MACHINE Filed June 6, 1927 3 Sheets-Sheet 3 Patented Jan. I, 1929.

UNITED FRANK W. SCHWINN, OF CHICAGO, ILLINOIS.

REFRIGERATING MACHINE.

1 Application filed June 6,

The present invention relates particularly to refrigerating machines; and the primary purpose is to provide a compact unit of improved construction which is capable of comparatively heavy duty, which can be manufactured at moderate cost, and which can'be housed within a small space.

The improved "refrigerating machine is well adapted, for example, for use in grocery stores, meat markets, etc., where it can be located, if desi ed, under a counter.

The invention involves a novel construction and arrangement of elements, enabling an exceedingly staunch and compact refrigerating machine to be produced at a minimum cost, consistent with reliability and durability.

The invention is illustrated in a preferred embodiment in the accompanying drawings, in which- Fig. 1 is a vertical longitudinal sectional -\'lO\V ota refrigerating machine embodying the invention; Fig. 2, a transverse vertical section taken as indicated at line 2 of Fig. 1; Fig. 3, a horizontal sectional view of the compressor-cylinders, the view being taken as indicated at line 3 of Fig. 1; Fig. 4, a broken inner perspective view of that portion of the crank-case of the compressor through which the crank-shaft extends; and Fig. 5, a perspective plan view of the mounting-plate employed.

In the embodiment of the invention lllllS- trated in the drawings, A designates a mounting-plate which preferably is stampedfrom heavy sheet steel and is supported on legs A which also preferably are stamped from sheet steel; B, a compressor mounted on the plate A and comprising cylinders B" and a crank-case B which crank-case depends through a transverse opening A with WlllCll the mounting-plate is provided near one end B a crank-shaft journalledin the crank-case and having one endprojecting past a lateral edge of the..m ounting-plate and equipped with a wheel, or. pulley, B B pistons working in the cylinders B and connected by pitmans B with the crank-shaft; C, an intake pipe'for the compressor which communicates through a passage C and branchpassages C with the cylinders, as shown 1n Figs. 1 and 3; D, a condenser-coil having convolutions about the upper portion of the compressor, the upper end of said coil commu'nlcating at 1927. Serial No. 196,750.

D with the cylinders B and communicating at its lower end with a pipe D which leads to the receiver for the compressed refrigerant; E, a water-jacket comprising an upper jacket-member E and a lower jacket-member E the mounting-plate A, A being interposed between and secured to said jacketmembers; F, a refrigerant-receiver which recelves the compressed refrigerant, for example, liquid ammonia, from the condensercoil; G, an electric motor surmounting and carried by themounting-plate A, said motor having a transversely extending armatureshaft G equipped with a pulley G which is connected by aibelt G with the pulley 'B, the casing, or frame, of the motor having pivotally connected therewith a belt-tensioning arm Gr equipped with an idler Gr engaging the upper stretch of the belt between the pulleys G and G H, a pressure-gauge connected with the receiver F; I, a water-inlet pipe connected with the bottom of the jacketmember E and J, a nipple connected with 'the upper portion of the jacketmember E and adapted for connection with a water-outlet pipe (not shown).

The mounting-plate A preferably is stamped from heavy sheet steel by means of a powerful press. In the pressing operation, the transverse opening A may be punched,-

this opening being of suflicient dimensions to accommodate the upper portion of the crank case B also, in the pressing operation, the mounting-plate is provided with a depend ing peripheral flange 1. At one end of the opening A the metal of the plate is stretched laterally and the flange 1 is bowed outwardly a point where the flange is cut away. The pulleys G and B are thus located at one side of the mounting-plate, and the belt G is disposed in a vertical plane parallel with the lateral edge of the mounting-plate.

The mounting-plate is provided on opposite sides of the slot, or opening, A with perforations 2 and 2 adapted to permit passages of the inlet refrigerant pipe C and outlet refrigerant pipe D respectively. The mounting-plate is provided at its lower side adjacent the edges of the slot A with reinforcing members 3 and 4, which maybe spotwelded to the plate, if desired.

The crank-case of the compressor is equipped at its upper portion with supporting lugs 5 which rest upon the mountingplate and are secured to the mounting-plate by cap-screws 6. The mounting-plate and reinforcing members are provided with tapped perforations 6" into which the cap-- screws are screwed. I

The crank-case l?) of the compressor is shown equipped with a removable bottomplate 7 which is so secured as to provide a liquid-tight joint. The crank-case is adapted to contain oil. It is provided at one side with a. blind-bearing 8 which receives one end of the crank-shaft. At the other side, the crank-case is equipped with a bearing 9 and an associated packing gland 9. The packing-gland projects freely through a perforation 10 with which the lower jacketmember E is provided. At the base of the projecting sleeve of the bearing is a flange 11, and a gasket 12 is interposed between said flange and the wall of the lower jacketmember. An external clamping ring 13 is secured in position b capscrews 14, and thus the wall of t e jacl et-member-is clamped between the ring 13 and the flange 11.

The upper and lower jacket-members E and E preferably are drawn from sheetmetal. The members are cup-shaped memhere, the upper one being inverted. They are provided at adjacent ends with outturned anges 15 and 16 eqllaiipped with reinforcing rings 15 and 16. etween the flanges and the interposed mounting-plate A are located gaskets 17 and 18. The parts are clampingly secured together by means of bolts, or capscrews, 19, providing a sealed joint.

As shown in Fig. 5, the plate A is provided with an annular series of perforations 19 through which the bolts 19 may extend. In Fig. 5, the dotted line 15 corresponds with the position of the flange 15of the upper jacket-member. shown) the metal of the mounting-plate may be struck upwardly slightly at the point where the gasket comes.

The mounting-plate is further provided, as shown in Fig. 5, with perforations 20 which are adapted to receive bolts 21 which serve to secure the motor G to the mountingplate. It will be-seen from the drawings that the compressor, water-jacket and attendant parts are mounted on one end of the mounting-plate, and the motor is mounted on the other end of said plate.

The refrigerant-receiver F is suspended beneath the mounting-plate and is located below the motor. Thus, the receiver is locat- If desired, (although not ed between the lower acl et n1embe1" E and the flange 1 at the free end of the mountingplate. The receiver which is in the form of a cylinder having closed ends has the upper portion of its cylindrical wall equipped with hangers 22, which may be spot-welded to the wall of the receiver and secured by bolts to the n'lounting-plate.

The outer end of the receiver is equipped with outlet pipes 24 and 25, which may lead to thepressure-gauge and to a. suitable pressure-reducing valve. It will be understood that the refrigerant passes from the receiver through one or both of the pipes 21 and 25, passes through a suitable pressure-reducing valve, and circulates through the pipes, or coils, (not shown) used for refrigerating or freezing purposes, the spent refrigerant finally returning through the pipe C to the compressor.

, Suitable means (not shown) ordinarily will be employed for controlling the operation of the motor which actuates the compressor; and, if desired, suitable means (not shown) may be used for making 'the circulation through the refrigerating coils responsive to temperature conditions in the compartment which is being cooled.

It will be understood that oil will be maintained in the crank-case B at a. level above the bearings. As will be understood from Figs. 2 and 4, the crank-case B is shown provided with a supplemental chamber 26 equipped with a plug 27 which may be re moved to permit the introduction of oil into the crank-case. The chamber 26 is located at one end of the crank-case and disposed above the bearing 9, and communicates with the packing in the bearing through a passage 26*. The bearing also communicates with the main chamber of'the crank-case through a passage 28. Thus, oil introduced into the chamber 26 may find its way through the bearing and through the passages mentioned into the main chamber of the crank-case; and, if desired, a passage may be provided directly through the wall, or web, 29 from the chamber 26 to the main chamber of the crank-case.

It will be understood from the description given that the mounting-plate, the legs which support the mounting-plate, and the jacket members may all be formed readily from sheet-metal. Also, it will be seen that the improved construction provides an exceedingly compact and durable refrigerating ma chine.

It will be observed that the pipes C and D extend throu h the lower jacket-member E In the case of the pipe C, a suitable packinggland 80 is employed at the point where the pipe enters the jacket; and it will be understood that a similar packing-gland'may be employed between the pipe D and the wall of the jacket. The pipe D communicates with the receiver at the point designated 31, and at which point a suitable check-valve may be employed, if desired.

The machine may be employed, for example, where very high compression is necessary or desirable in liquefying a refrigerator, such as ammonia.

The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom.

\Vhat- I regard. as new, and desire to secure by Letters Patent is:

1. Refrigerating apparatus comprising a mounting-plate having an aperture therethrough, a compressor supported on said plate and having a crank-case depending through said aperture, a. refrigerant-receiving cooling-coil connected with and encircling the upper portion of said compressor, a waterjacket enclosing the compressor, coil and til) crank case and comprising upper and lower jacket-members between which said mounting-plate is interposed, and means securing together said jacket-members and interposed mounting-plate.

2. Refrigerating apparatus comprising a mounting-plate having an aperture therethrough, a compressor supported on said plate and having a crank-case depending through said aperture, a cooling-coil receiving refrigerant from the compressor, said coil encircling the upper portion of said compressor, a water-jacket enclosing the compressor, coil and crank case and comprising upper and lower jacket-members between which said mounting-plate is interposed, means securing together said jacket-members and interposed mounting-plate, a crank-shaft journalled in said crank-case and extending through said lower jacket-member and having its end projccting past a lateral edge of said mountingplate and equipped with a pulley, a motor surmounting said mounting-plate and having an armature-shaft equipped with a pulley disposed in the plane of said first-mentioned pulley, and a belt connecting said pulleys.

3. Refrigerating apparatus comprising a mounting-plate provided at one end with an aperture, a compressor supported on said plate and having a crank-case depending through said aperture, a water-jacket comprising upper and lower jacket-members having sealed connection with each other at the plane of said mounting-plate, a cooling-coil located within the upper jacket-member and communicating with said compressor, an admission pipe leading through the lower jacket-member and the mounting-plate and communicating with said compressor, an outlet pipe c-oinn'iunicating with said coil and leading through the 1i1ounting-plate and lower jacket-member, a receiver housed beneath said mounting-plate adjacent the lower jacket-member and connected with said outlet pipe, a motor surmountin said mountingplate above said receiver, an driving connections between said motor and compressor.

4. Refrigerating apparatus comprising a mounting-plate, upper and lower jacketmembers equipped with flanges between which the mounting-plate is clamped, said mounting-plate having an aperture within the jacket, a compressor having a crank-case supported on said mounting-plate and depending through said aperture, said crankcase having a bearing and associated packinggland extending through an opening in said lower acket-member, and a gasket interposed between said bearing and the wall of said lower j acket-member.

5. Refrigerating apparatus comprising a mounting-plate having an aperture therethrough, complemental jacket-members equipped with flanges between which said plate is interposed, gaskets interposed between said flanges and said plate, bolts securing said flanges and plate together, a compressor within said jacket having a crankcase depending through said aperture and having cylinders disposed within the upper member of said jacket, a cooling-coil encircling said cylinders and communicatin therewith, an inlet pipe extending jllIOllg] the lower jacket-member and mounting-plate and communicating with said cylinders, an outlet pipe communicating with said coil and extending through said mounting-plate and laterally through the lower jacket-member, a receiver suspended from said mounting plate adjacent the lower jacket-member and communicating with said outlet pipe, a motor mounted on said mounting-plate above said receiver, and driving connections between saidmotor and the crank-shaft of said compressor.

6. Refrigerating apparatus comprising a mounting-plate having a depending peripheral flange and having one end portion provided with a transversely extending aperture, upper and lower jacket-members embracing said plate within the area defined by said flange, bolts connecting said jacketmembers and interposed plate, a. compressor having .a crank-case supported on and depending through said aperture, said crankcase having a bearing extending through a lateral opening with which the lower jacketmember is provided, connect-ions including a gasket providing a sealed joint between said bearing and the wall of the lower acketmember, a cooling-coil within the upper jacket-member encircling the upper portion of the compressor, an admission pipe extending through the lower jacket-member and the mounting-plate and having connection with the compressor cylinders within the space occupied by the cooling-coil, an outlet .pipe leading from the cooling-coil downwardly through said mounting-plate and passing through the lower jacket-member, a

receiver adjacent the lower jacket-member and housed beneath the other end of the mounting-plate, a motor surmounting the 5 mounting-plate above the space occupied by the receiver, a'crank-shaft journalled in said crank-case and extending through a bearing mentioned, and driving connections between said motor and said crank-shaft.

7 In refrigerating apparatus, a mounting-plate equipped with supporting legs and provided at one end with an aperture, gaskets above and below said plate adjacent said aperture, jacket-members having flanges 1 engaging said gaskets, and bolts connecting said flanges and the interposed gaskets and mounting-plate.

8. In refrigerating apparatus, an elongated rectangular sheet-metal mountingplate provided with a depending peripheral flange, said mounting-plate having one end portion provided with an aperture adapted to accommodate the crank-case of a com pressor, said plate being further provided with a seriesof perforations encirclingsaid aperture, the other end portion of saidv mounting-plate being equipped with means for enabling a motor to be secured thereon.

9. A mounting-plate for the purpose set forth, comprising a sheet-metal member stamped to provide a depending flange and having one end portion provided with an elongated transversely disposed aperture, the

metal of the plate at one end of said aperture being stretched and the flange at that pointbowed outwardly and partially cut away.

10. In refrigerating apparatus, a mounting-plate provided with an aperture, a jacket comprising upper and lower members embracing and secured to said mountingplate, and a'compressor mounted on said mounting-plate and having a crank-case depending through said aperture, said crankcase being equipped with a bearing extending through and having sealed connection with the lower jacket-member and said crank-case being equipped with a supplemental chamber disposed above said bearing and having a passage communicating with the interior of the bearin 11. In refrigerating apparatus, a mounting-plate provided with an aperture, a jacket comprising upper and lower members embracing and secured to said mountingplate, and a compressor mounted on said mounting-plate and having a crank-case de pending through said aperture, said crank case being equipped with a bearing extending through and having sealed connection with the lower jacket-member and said crank-case being equipped with a supplemental chamber disposed above said bearing and having a passage communicating with the interior of the bearing, said bearing having also an oil passage communicating with the main chamber of the crank-case.

FRANK W. SCHWINN. 

